New Haven weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Poor
Best time to visit: July – August
What is the weather like in New Haven in October?
In October, New Haven is mild: daytime highs average 17 °C, and nights cool down to about 11 °C. The sea averages 18.2 °C – bracing, so a wetsuit helps for longer swims. Expect around 6 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 119 mm in total. All in all, October is not an ideal month for a holiday in New Haven.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 64 | 25 | 19 |
| Day | 23° | 17° | 11° |
| Night | 17° | 11° | 5° |
| Sea | 22° | 18° | 13° |
| Sun | 6 h | 6 h | 5 h |
| Rain days | 9 | 10 | 9 |
More details for October
- Daylight
- 11 h 11 min07:02 – 18:13
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or moreAll months
- Wind
- 24 km/haverage daily peakAll months
- Cloud cover
- 52 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %17 %
- Sunshineweight 20 %43 %
- Few rainy daysweight 20 %61 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
New Haven in October: quick answers
Is New Haven hot in October?
No. In October, New Haven is mild: daytime highs average 17 °C and nights drop to about 11 °C.
Can you swim in New Haven in October?
Only if you don't mind cold water: in October the sea averages just 18.2 °C. Comfortable swimming is possible from July to September.
Does it rain much in New Haven in October?
Rain is frequent, with about 10 rainy days and 119 mm in total.
New Haven month by month
The whole year in New HavenAll destinations: USAWhere to go in OctoberSea temperature in October
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences